« Previous AbstractEnhanced Iron Uptake in Plants by Volatile Emissions of Rahnella aquatilis JZ-GX1    Next AbstractGenome Sequencing of Rahnella victoriana JZ-GX1 Provides New Insights Into Molecular and Genetic Mechanisms of Plant Growth Promotion »

Front Microbiol

Title:		Antifungal effects of volatile organic compounds produced by Trichoderma koningiopsis T2 against Verticillium dahliae
Author(s):		Kong WL; Ni H; Wang WY; Wu XQ;
Address:		"Co-innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China. Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, China"
Journal Title:		Front Microbiol
Year:		2022
Volume:		20220921
Issue:
Page Number:		1013468 -
DOI:		10.3389/fmicb.2022.1013468
ISSN/ISBN:		1664-302X (Print) 1664-302X (Electronic) 1664-302X (Linking)
Abstract:		"Volatile organic compounds (VOCs) produced by microorganisms are considered promising environmental-safety fumigants for controlling soil-borne diseases. Verticillium dahliae, a notorious fungal pathogen, causes economically important wilt diseases in agriculture and forestry industries. Here, we determined the antifungal activity of VOCs produced by Trichoderma koningiopsis T2. The VOCs from T. koningiopsis T2 were trapped by solid-phase microextraction (SPME) and tentatively identified through gas chromatography-mass spectrometry (GC/MS). The microsclerotia formation, cell wall-degrading enzymes and melanin synthesis of V. dahliae exposed to the VOC mixtures and selected single standards were examined. The results showed that the VOCs produced by strain T2 significantly inhibited the growth of V. dahliae mycelium and reduced the severity of Verticillium wilt in tobacco and cotton. Six individual compounds were identified in the volatilome of T. koningiopsis T2, and the dominant compounds were 3-octanone, 3-methyl-1-butanol, butanoic acid ethyl ester and 2-hexyl-furan. The VOCs of strain T2 exert a significant inhibitory effect on microsclerotia formation and decreased the activities of pectin lyase and endo-beta-1,4-glucanase in V. dahliae. VOCs also downregulated the VdT3HR, VdT4HR, and VdSCD genes related to melanin synthesis by 29. 41-, 10. 49-, and 3.11-fold, respectively. Therefore, T. koningiopsis T2 has potential as a promising biofumigant for the biocontrol of Verticillium wilt disease"
Keywords:		Trichoderma koningiopsis Verticillium dahliae melanin microsclerotia volatile organic compounds;
Notes:		"PubMed-not-MEDLINEKong, Wei-Liang Ni, Hang Wang, Wei-Yu Wu, Xiao-Qin eng Switzerland 2022/10/11 Front Microbiol. 2022 Sep 21; 13:1013468. doi: 10.3389/fmicb.2022.1013468. eCollection 2022"